Buffing-machine.



R. S. BROWN.

BUFHNG MACHINE. APPLICATION map APR.26, 19m.

Patented Sept. 5, 1916. I

3 SHEETS-SHEET 1.

. h m H m\ m\ w Q c Q v QMWJM. Q

R. 3. BROWN.

BUFFING MACHINE.

APPLICATION FILEDAPR. 25, $916.

Patented Sept. 5,1916.

3 SHEETS-SHEET Z.

1-- il m A1 farm-Y nu: mum's nuns m. FNoTo LIYHO WASHmz; mu. u c

R. 8. BROWN. BUFFING MACHINE.

APPLICATION FILED APR.26.1916.

Patented Sept. 5, 1916. a SHEETS-SHEETS m: mmms Pcrsns c ROBERT S. BROWN, OF NEW BRITAIN, CONNECTICUT, ASSIGNOR TO THE NEW BRITAIN MACHINE COMPANY, OF NEW BRITAIN, CONNECTICUT, A CORPORATION OF CON- NECTICUT.

BUFFING-MACI-IINE.

Patented Sept. 5, 1916.

Application filed April 26, 1916. Serial No. 93,627.

To all whom it may concern I Be it known that I, ROBERT S. BROWN, a citizen of the United States, residing at New Britain, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Bufling-Machines, of Which the following is a specification.

This invention relates to what I shall for convenience term a buffing machine. It will be noted that I say convenience this for the reason that although the improvements are shown incorporated in a machine of the character set forth, they are susceptible, certainly in some instances, of more general use;

One of the principal features of the invention is the provision of means of an effective nature whereby one or more tool members can be readily dismounted and as easily replaced, or one or more of a difi'erent nature substituted therefor.

Another important point is the provision of means of a simple kind whereby the functions stated can be accomplished without disturbing the. adjustment or adjustments of bearing means.

The invention comprises other features of novelty and advantage, which with the foregoing will be stated at length in the following description, wherein I Will set forth fully that form of embodiment of the invention which I have selected for illustration in the drawings accompanying and forming part of the present specification. I do not restrict myself to this disclosure; I may depart therefrom in several respects within the scope of the invention defined by the claims following said description.

Referring to said drawings: Figure 1 is a perspective view from the front and right side of a buffing machine embodying the invention, showing several of the tools removed and the hood in belt-tightening position. Fig. 2 is a like view but from the opposite side, with an arm or bracket swung down into tool releasing position and with the hood in belt-freeing relation; Fig. 3 is a side elevation as seen from the left of the machine, the tool supporting shaft being in cross section and the hood and certain adjunctive elements being shown in difi'erent positions by full and dotted lines respectively. Fig. 4 is a front elevation of the pivot or main shaft, the rotary shaft and the cooperative associated bracket, the head or boxing portion of the bracket being in section, and the tools being removed from the rotary shaft. Fig. 5 is a top' plan view of the parts shown in Fig. 4. Fig. 6 is a detail view of the inner portion of said bracket and its supporting shaft, the bracket being shown in a shaft releasing position by dotted lines. Fig. 7 is a section on the line 77 of Fig. 6, looking in the direction of the arrows, the bracket and its shifting device being shown in two positions by full and dotted lines respectively.

Like characters refer to like parts throughout the several views, which are on different scales.

While as I have stated the invention certainly as to some of its features, is susceptible to general use, it is of particular utility when incorporated in a buffing or grinding machine, the terms bufling and grinding in the present instance being used alternately. When so utilized the bufling machine may be of any suitable character. Broadly speaking it is of practically the same type as that shown in Letters Patents N 0. 1,006,529 issued to me October 24, 1911, and 1,049,289 granted to meqDecember 31, 1912, and to which reference may be had for a more detailed description of pointswhich do not in themselves concern the invention.

Referring to Figs. 1, 2 and 3 for example, the machine comprises a column or upright as 2 surmounted by a. hood 3, both hollow. The column 2 with the lateral extensions 4 at the back thereof sustain for rocking motion the supporting or pivot shaft 5 to which the hood 3 is rigidly connected and which turns in suitable bearings on the column or the side extensions 4 thereof. This shaft 5 extends outwardly from the column, although this may not always be necessary.

' Preferably, however, one end of the supporting or pivot shaft should project from the column. It will, therefore, be clear that asthe shaft 5 is rocked in its hearings in the column, the hood 3 is swung up and down.

Extending through the hood 3 at about a place practically midway between the front and rear thereof is the rotary shaft 6 which is provided with one or more tools. As shown this shaft extends outwardly from oppo ite sides of the h d, each extended portion being of such length as shown as to carry several tools as 7. These tools may consist of bufling or grinding wheels, and they are ordinarily of different grades, so that after a piece of work has been subjected to the action of one tool, it can be shifted to the next and so on to obtain different efiects. Within the head and fastened to the rotary shaft 6 is a pulley as 8 adapted to receive a belt as 9 practically in the manner shown in the patents hereinbefore mentioned.

Between the column 2 and the hood 3 are toggle links 10 and 11, the links being pivoted to each other, the link 10 being jointed to the column 2, while the link 11 is pivoted to the free portion of the hood. The link 11 is provided with a manipulating portion 12. Through the agency of the toggle, the hood 3 can be raised and lowered to loosen and tighten the belt 9 and to lock the hood in its upper position to maintain the belt in tightened position. This belt and the accessories just set forth are practically like those shown in the first of my hereinbefore mentioned patents. It will be clear that when the hood 3 is up as shown by full lines in Fig. 3, the belt 9 will be tightened so as to effect the rotation of the pulley 8 and shaft 6 and consequently of any tool or tools that may be carried by said shaft. When the hood is down, the parts will not be rota-. ted owing to the fact that the belt is lax.

The extended ends of the pivot or supporting shaft 5 have connected therewith brackets or arms 13 of duplicate construction, said brackets being connected with the supporting shaft for lateral and swinging movements, the lateral movement being provided for the connection or disconnection of the brackets with the projecting ends of the rotary or power shaft 6, while the swinging movement is intended to carry the brackets wholly free of the said shaft 6 so as to effect the easy removal of a wheel as 7 from the shaft and the application of such a wheel thereto. In Fig. 1 one of the brackets 13 is shown as occupying its operative or shaft supporting position, and this bracket and the parts associated therewith will be hereinafter more particularly described, the description applying to the other bracket and 7 its corresponding parts.

The wheels 7 may be caused to rotate with the shaft 6 in any desirable manner. As shown said shaft adjacent the hood 3 is furnished with collars 14, said shaft near its free ends being provided with adjustable collars shown as consisting of nuts 15 which can be run in so as jointly with the fixed collars 14 to clamp the buffing wheels 7 therebetween. As will be clear the shaft in some cases might project merely from one side of the hood 3 or similar supporting part, and it might be equipped with merely one wheel or other convenient tool. It will be assumed that the bracket 13 in Fig. 4c is disconnected from the corresponding end of its shaft and is swung clear of such shaft and that the shaft does not carry a wheel. To apply a wheel to the shaft the nut 15 will be run off or completely separated from the shaft when the necessary wheel or wheels can be slipped onto the shaft. In this case there would be several of such wheels, and when they have been applied, the nuts 15 will be put on and with the aid of the cooperating collar 14 will clamp the wheels in place. After the wheels are positioned, the bracket will be connected up operatively to the connecting portion of the shaft.

As already noted the bracket 13 is shown as being in its operative relation in Fig. 1, receiving the free adjacent end of the shaft 6. When the said bracket is in its normal position it is adapted to turn with the shaft 5, and this condition can be secured in any desirable way. As shown the hub 16 of the bracket is split to constitute a divided clamp, said split or divided hub (see Fig. 1) having at opposite sides of its split the lugs or ears 17 or 18. Through the lug 17 the setting screw 19 extends the threaded portion of the screw being tapped into the lug 18 and the shank of the screw having a collar 20 to engage the outer face of the lug 17 The screw or threaded rod 19 is supported at its forward end by a projection 21 near the free end of the bracket 13 and is equipped with an arm 22 by which said screw or rod 19 can be turned to tighten or loosen the split clamping hub 16 on the supporting or pivot shaft 5. It will be clear that when the bracket 13 is clamped to the shaft 5 and that when the latter is turned, the former will swing with the shaft. It will be obvious that I am merely describing one bracket and its cotiperating elements, this applying to the other and similar parts which in the present case are of like structure. It will be observed also that when the two brackets are in their normal position, they are alined transversely of the machine or longitudinally of the parallel shafts 5 and 6. By properly turning the screw rod 19 through the intervention of the handle 22, the lugs 17 and 18 can be separated or spread to cause the opening of the clamping hub 16 and the subsequent movement of the bracket or arm 13. Under ordinary circumstances the mere clamping of the bracket 13 to the supporting shaft 5 might hold the bracket in its operative position, but ll prefer to provide for this purpose means of a more positive kind, the key 23 (Figs. 6 and 7 answering satisfactorily in this connection, the shaft having a seat to receive the key and the bore of the hub 16 having a complemental keyway 24: to receive said key when said bracket is in its normal position.

As shown the inner side of the hub 16 has an arcuate slot 25, the front end of which I is coincident with the front wall of the keyway 24, while the back end of which is 5 spaced from the keyway a distance agreeing with the amount of swinging movement that the bracket should have as will hereinafter more particularly appear. The rear wall of the arcuate slot constitutes a stop to be engaged by said key as will also hereinafter appear to limit the angular motion of the bracket. The keyway 24 does not extend the complete length of the hub 16 (Fig. 7), extending short of the inner face of the hub and opening into or intersecting the front end of the slot 25. The inner side of said slot 25 opens into the bore or chamber of the hub 16. The key 23 when said bracket 13 is in operative position, extends out of the inner end of'the keyway 24 and into the front end of the slot 25.

The bracket 13 has at its free end the boxing or housing 26 adapted to contain a suitable lubricant such as oil. In this box- 25 ing 26 is situated the divided sleeve 27 having a peripheral flange 28, the lower part of which is provided with a spherical part 29 to engage a correspondingly shaped seat in the bottom of the boxing or hollow head 30 26. This peripheral flange 28 is perforated or slotted in its bottom to provide for the passage into the sleeve 27 of the oil taken up from the bottom of the boxing. This oil can be introduced into the boxing by 5 way of the oiler 26 in the back part of the head 26. The sleeve 27 may be held in an adjusted position in any desirable manner as by the screw 32 tapped through the top of the boxing and the plain inner end of 0 which is adapted to enter a socket 33 in the upper section of the split sleeve 27, all as shown best in Fig. 4. In the sleeve 27 is a bushing or hearing member 34 internally tapered to receive the correspondingly ta- .pered end 35 of the cooperating extension of the shaft 6. It will be clear that owing to the manner in which the boxing 26 is associated with the shaft 6 that the bracket 7 or arm 13 can be freed from the shaft or connected thereto without disturbing the adjustment of any of the parts in the boxing. The bushing or inner sleeve 34 is provided between its ends with a circumferential bead 36 extending through a peripheral slot 37 in the outer sleeve 27 for the purpose of taking up oil. This slot 37 is in communication with the slots 38 in the peripheral flange 28.

It will be assumed that both brackets or arms 13 are in their operative positions as shown in Fig. 1 and that the two extended portions of the shaft 6 have clamped thereto the necessary abrading or grinding wheels 7. As will be inferred one set of these 6 wheels is omitted in both Figs. 1 and 2.

With the machine in normal position and when thehood 3 is raised as shown in full lines while the belt 9 is in motion, said belt will operate the pulleyv 8 and the latter in turn will rotate the shaft 6 so that the two sets of grinding or bufling wheels will be do is to lower the hood 3 to the dotted line position in Fig. 3. When this is done the necessary bracket 13 is moved to shaft free- 35 ing position, being initially moved laterally in an outward direction as shown by dotted lines in Fig. 7 so as to carry the key 23 out of the keyway 24 at which time the extended adjacent portion of the shaft 6 will be I carried wholly outside of the boxing 26 on the bracket, assumed to .be the bracket at the left in Figs. 1 and 2. As soon as the key 23 is out of the keyway 24, the bracket or arm 13 can drop as shown by dotted lines in Fig. 6 so as to permit the free removal of the wheel or wheels on the 006perating portion of the shaft and the substitution if necessary of other or others therefor. In Fig. 2 the arm or bracket 13 at the left is shown as being in its adjusted angular position, its boxing or head portion being spaced or separated from the adjacent end of the shaft 6 a distance suflicient to permit the free mounting or dismounting of a wheel or wheels. It will be understood, of course, that before the bracket in question can be moved laterally, it is necessary that the split or divided hub 16 be opened sufficiently to permit the dropping of the bracket. As will be evident, this is accomplished through the agency of the screw rod 19.

It is sometimes diflicult to move a bracket or arm as 13 laterally, and I provide means by which this function can be mechanically obtained. The same may be of any desirable character, although those now to be described answer satisfactorily.

Between the keys 23 and the column 2 are disposed collars 40 suitably rigidly connected with the shaft 5, said collars having circumferential projections 41 engaged by the inner ends of the screws 42 threaded through the brackets 13 in proximity to and in parallelism with said shaft 5. The outer ends of the screws 42 are provided with handles 43.. As I have stated when the machine is in operative relation the inner ends of these screws 42 abut against the projec- 13o ;turned by its lever or arm 43 to slide the loosened bracket 13 outwardly an extent suflicient to carry the boxing 26 thereof free of the cooperating end of the shaft 6, at which point the key 23 will have passed out of the keyway 2 1 when the bracket 18 can drop in the manner set forth.

The shaft 6 may as shown have at its ends stops as 1 1 consisting of circular flanges and against which the respective brackets 13 can abut when they have been moved outwardly a distance sufiicient to permit their free ends to clear the projecting portions of the rotary or power shaft 6.

IV hat I claim is:

1. In a machine of the class described, the combination of a swinging member and its pivot, a rotary shaft supported by and extending laterally from the swinging member, and a bracket connected with the pivot and removably connected with the shaft.

2. In a machine of the class described, the combination of a swinging hood and its pivot, a shaft supported by and extending laterally from the hood, the shaft extending into the hood, a driving member for the shaft connected thereto within the hood, and a bracket connected with the pivot and removably supporting the shaft.

3. In a machine of the class described, the combination of a rocking pivot, a member rigidly connected with said pivot to swing therewith, a rotary shaft supported by the swinging member and extending outwardly therefrom, and a bracket adapted to rock with the pivot and removably connected with the extended portion of the shaft.

1. In a machine of the class described, the combination of a swinging member, a pivot to which said swinging member is rigidly connected, a shaft supported for rotation by the swinging member and extending outwardly therefrom, a bracket connected with the pivot for lateral and swinging movements, and means for holding the bracket in its normal position, the bracket when in its normal position supporting the extended portion of the shaft.

5. In a machine of the class described, the combination of a swinging member and its pivot, a rotary shaft supported by and extending laterally from the swinging member, and a bracket connected with the pivot, having a hollow lubricant-receiving head to removably receive the extended portion of the shaft.

6. In a machine of the class described, the

combination of a swinging member and its pivot, a rotary shaft supported by and extending laterally from the swinging member, and a bracket connected with the pivot, having a hollow lubricant-receiving head to removably receive the extended portion of the shaft, said head having a lubricator at the back thereof.

7. In a machine of 'the class described, the combination of a swinging member, a pivot to which said swinging member is rigidly connected, a shaft supported for rotation by the swinging member and extending outwardly therefrom, .a bracket connected with the pivot for lateral and swinging move ments', means for holding the bracket normally rigidly with the pivot, the bracket having a head and the head being provided with a bearing to receive the extended por tion of the shaft, and means for holding the bearing in an adjusted position, the head and bearing being separable from the extended portion of the shaft on the lateral movement of the bracket without disturbing the adjustment of the bearing.

8. In a machine of the class described, the combination of a swinging member, a pivot to which said swinging member is rigidly connected, a shaft supported for rotation by the swinging member and extending outwardly therefrom, abracket connected with the pivot for lateral and swinging movements, means for holding the bracket normally rigidly with the pivot, the bracket having a head and the head being provided with a bearing to receive the extended portion of the shaft, and means for holding the bearing in an adjusted position, the head and bearing being separable from the extended portion of the shaft on the lateral movement of the bracket without disturbing the adjustment of the bearing, and the head having means at the back thereof for supplying a lubricant into the head.

9. In a machine of the class described, the'combination of a swinging member, a pivot to which said swinging member is rigidly connected, a shaft supported for rotation by the swinging member and extending outwardly therefrom, a bracket connected with the pivot for lateral and swinging movements, means for normally holding the bracket rigid with the pivot, the bracket when in its normal position supporting the extended portion of the shaft, and means for positively moving the bracket laterally.

10. In a machine of the class described, the combination of a swinging member, a pivot to which said swinging member is rigidly connected, a shaft supported for rotation by the swinging member and extending outwardly therefrom, a bracket connected with the pivot for lateral and swinging movements, means for normally holding the bracket rigid with the pivot, the bracket when in its normal position supporting the extended portion of the shaft, and a screw tapped through the bracket, the pivot having fixed means to be engaged by the screw, whereby when the screw is turned, the bracket will be moved laterally.

11. In a machine of the class described, the combination of a swinging member, a pivot to which said swinging member is rigidly connected, a shaft supported for rotation by the swinging member and extending outwardly therefrom, a bracket connected with the pivot .for lateral and swinging movements, means for holding the bracket rigid with the pivot when the bracket is in its normal position, the bracket when in said normal position supporting the extended portion of the shaft, a collar rigid with the pivot, and a screw tapped through the bracket and engaging said collar.

12. In a machine of the class described, the combination of a swinging member, a pivot to which said swinging member is connected, a shaft supported for rotation by the swinging member and extending outwardly therefrom, a bracket, and means for clamping the bracket to the pivot, the bracket when in its normal position supporting the extended portion of the shaft.

13. In a machine of the class described, the combination of a swinging member, a pivot to which said swinging member is rigidly connected, a shaft supported for rotation by the swinging member and extend- Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

ing. outwardly therefrom, a bracket supported by the pivot for lateral and swinging movements, a key for keying the bracket to the pivot, the bracket when moved laterally a distance being freed by the key to permit swinging movement of the bracket and the bracket when in its normal position supporting the'extended portion of the shaft.

14:. In a machine. of the class described, the combinationof a swinging member, a pivot to which said swinging member is rigidly connected, a shaft supported for rotation by the swinging member and extending outwardly therefrom, a bracket supported by the pivot for lateral and swinging movements, a key for keying the bracket to the pivot, the bracket when moved laterally a distance being freed by the key to permit swinging movement of the bracket and the bracket when in its normal position supporting the extended portion of the shaft, the

key acting to limit swinging movement of the bracket when the latter has been'moved laterally the requisite distance to permit of said swinging movement.

In testimony whereof I afiix my signature in presence of two witnesses.

' ROBERT S. BROWN. Witnesses:

A. BUoL, WILLIS C. WARNER.

Washington, I). G. 

